If you are considering breeding your 23 year old Arabian mare, it is important to have her evaluated by a veterinarian to assess her overall health and reproductive status. The veterinarian can perform tests to determine if she is still ovulating and if her reproductive tract is healthy. They can also provide guidance on how to manage her breeding and care to increase the chances of a successful pregnancy.
It is also important to note that breeding an older mare can come with increased risks, such as complications during pregnancy and foaling. Therefore, it is essential to make an informed decision based on the mare's individual circumstances and with the guidance of a qualified veterinarian.